#include <stdio.h>
#include "tree.h"

int main(int argc, const char *argv[]){

    bitree r = tree_create();
    if (r == NULL)
	return -1;

    preorder(r);
    puts("");

    inorder(r);
    puts("");

    postorder(r);
    puts("");

    layerorder(r);
    return 0;
}
